About Cartesi (CTSI) Cartesi is an application-specific rollups execution layer with a Linux runtime. Cartesi’s RISC-V virtual machine allows developers to import decades of open-source wisdom to blockchain applications and build decentralized applications with their favorite libraries, compilers, and other time-tested open-source tooling. Cartesi Rollups can be deployed as layer 2 (on top of Ethereum) or as layer 3 (on top of Optimism, Arbitrum, zkEVM chains, etc.), or as sovereign rollups.